Intel Xeon E5-4640 v2 vs Intel Xeon E5-4657L v2

Comparative analysis of Intel Xeon E5-4640 v2 and Intel Xeon E5-4657L v2 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark.

Intel Xeon E5-4640 v2

Intel Xeon E5-4657L v2

Differences

Reasons to consider the Intel Xeon E5-4640 v2

Around 21% lower typical power consumption: 95 Watt vs 115 Watt
Around 6% better performance in PassMark - Single thread mark: 1373 vs 1291

Specifications (specs)
Thermal Design Power (TDP)	95 Watt vs 115 Watt
Benchmarks
PassMark - Single thread mark	1373 vs 1291

Reasons to consider the Intel Xeon E5-4657L v2

2 more cores, run more applications at once: 12 vs 10
4 more threads: 24 vs 20
Around 7% higher clock speed: 2.90 GHz vs 2.70 GHz
Around 8% higher maximum core temperature: 81°C vs 75°C
Around 13% better performance in PassMark - CPU mark: 21548 vs 19028

Specifications (specs)
Number of cores	12 vs 10
Number of threads	24 vs 20
Maximum frequency	2.90 GHz vs 2.70 GHz
Maximum core temperature	81°C vs 75°C
Benchmarks
PassMark - CPU mark	21548 vs 19028

Compare benchmarks

CPU 1: Intel Xeon E5-4640 v2
CPU 2: Intel Xeon E5-4657L v2

PassMark - Single thread mark

CPU 1

CPU 2

1373

1291

PassMark - CPU mark

CPU 1

CPU 2

19028

21548

Name	Intel Xeon E5-4640 v2	Intel Xeon E5-4657L v2
PassMark - Single thread mark	1373	1291
PassMark - CPU mark	19028	21548

Compare specifications (specs)

	Intel Xeon E5-4640 v2	Intel Xeon E5-4657L v2
Essentials
Architecture codename	Ivy Bridge EP	Ivy Bridge EP
Launch date	Q1'14	Q1'14
Place in performance rating	1396	1405
Processor Number	E5-4640V2	E5-4657LV2
Series	Intel® Xeon® Processor E5 v2 Family	Intel® Xeon® Processor E5 v2 Family
Status	Launched	Launched
Vertical segment	Server	Server
Performance
64 bit support
Base frequency	2.20 GHz	2.40 GHz
Bus Speed	8 GT/s QPI	8 GT/s QPI
Manufacturing process technology	22 nm	22 nm
Maximum core temperature	75°C	81°C
Maximum frequency	2.70 GHz	2.90 GHz
Number of cores	10	12
Number of QPI Links	2	2
Number of threads	20	24
VID voltage range	0.65-1.30V	0.65-1.30V
Memory
Max memory channels	4	4
Maximum memory bandwidth	59.7 GB/s	59.7 GB/s
Maximum memory size	768 GB	768 GB
Supported memory types	DDR3 800/1066/1333/1600/1866	DDR3 800/1066/1333/1600/1866
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	4	4
Package Size	52.5 mm x 45 mm	52.5 mm x 51 mm
Sockets supported	FCLGA2011	FCLGA2011
Thermal Design Power (TDP)	95 Watt	115 Watt
Peripherals
Max number of PCIe lanes	40	40
PCI Express revision	3.0	3.0
PCIe configurations	x4, x8, x16	x4, x8, x16
Scalability	4S Only	4S Only
Security & Reliability
Execute Disable Bit (EDB)
Intel® OS Guard
Intel® Secure Key technology
Intel® Trusted Execution technology (TXT)
Advanced Technologies
Enhanced Intel SpeedStep® technology
Idle States
Instruction set extensions	Intel® AVX	Intel® AVX
Intel 64
Intel® AES New Instructions
Intel® Demand Based Switching
Intel® Hyper-Threading technology
Intel® TSX-NI
Intel® Turbo Boost technology
Physical Address Extensions (PAE)	46-bit	46-bit
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)